Steering wheel light bar

ABSTRACT

Various implementation of a light bar warning system for a steering wheel of a vehicle include a liquid crystal display (LCD), a light guide, and at least one light source disposed adjacent the light guide. The LCD and light guide having arcuate shaped surfaces that follow along a portion of the steering wheel rim. Light emitted from the light source is transmitted through the light guide and out of its outer surface into an inner surface of the LCD that is disposed adjacent the light guide. The light is emitted through portions of the LCD that are activated for illumination by an LCD driver. The LCD may provide various types of warnings to the operator, including blind spot warnings, forward collision/proximity warnings, and lane departure warnings, for example.

CROSS REFERENCE TO RELATED APPLICATION

This application claims priority to U.S. Provisional Patent Application No. 62/152,574, entitled “Steering Wheel Light Bar,” filed Apr. 24, 2015, the content of which is herein incorporated by reference in its entirety.

TECHNICAL FIELD

This invention generally relates to a steering apparatus including a light element. More specifically, the invention relates to a vehicle steering wheel including a light element providing indication and warning signals to the user.

BACKGROUND

Various advanced driver assistance systems incorporate visual, acoustic and/or sensor warnings. Visual interfaces for these assistance systems must minimize both driver reaction time to warnings and the workload on the driver to comprehend and respond to the warning or information. Conventional instrument panel and center-stack displays require the driver's attention be drawn away from navigating the vehicle. Similarly, idealized heads up displays can be jarring and sometimes distracting to the driver. Therefore, a need in the art exists for a driver assistance system that utilizes the driver's peripheral vision and allows the driver to keep both hands on the wheel while maintaining focus in their direct line of sight. In doing so, drivers can gain valuable and important reaction time in critical driving situations.

BRIEF DESCRIPTION OF DRAWINGS

The device is explained in even greater detail in the following exemplary drawings. The drawings are merely exemplary to illustrate the structure of preferred devices and certain features that may be used singularly or in combination with other features. The invention should not be limited to the implementations shown.

FIG. 1 is a partial view of an exemplary steering apparatus;

FIG. 2 is a partial view of an exemplary steering apparatus;

FIG. 3A is a schematic cross-section view of an exemplary steering grip;

FIG. 3B is a partial view of a top section of an exemplary steering grip;

FIG. 3C is a schematic partial cross-section view of an exemplary steering grip and light element;

FIG. 4 is a schematic partial cross-section view of an exemplary steering grip and light element;

FIG. 5A is a partial cross-section view of an exemplary light element;

FIG. 5B is a partial cross-section view of an exemplary light element;

FIG. 5C is a partial cross-section view of an exemplary light element;

FIG. 6A is a plan view of an exemplary steering grip;

FIG. 6B is a plan view of an exemplary steering grip;

FIG. 6C is a plan view of an exemplary steering grip;

FIG. 6D is a plan view of an exemplary steering grip;

FIG. 7 is a partial plan view of an exemplary steering grip and light element;

FIG. 8 is a partial plan view of an exemplary steering grip and light element;

FIG. 9 is a partial plan view of an exemplary steering grip and light element;

FIG. 10 is a partial plan view of an exemplary steering grip and light element;

FIG. 11 is a partial plan view of an exemplary steering grip and light element;

FIG. 12 is a partial plan view of an exemplary steering grip and light element;

FIG. 13 is a schematic computer system architecture of an exemplary steering apparatus;

FIG. 14 is a schematic computer system architecture of an exemplary steering apparatus;

FIG. 15 is a perspective partial front view of a steering wheel on which a shaped light bar warning system is disposed, according to one implementation;

FIG. 16 is a left perspective view of the shaped light bar warning system shown in FIG. 15;

FIG. 17 is a partial right perspective view of the shaped light bar warning system of FIG. 15 cut along the A-A line of FIG. 2;

FIG. 18 is a partial left perspective view of the shaped light bar warning system of FIG. 15;

FIG. 19 is an exploded view of the shaped light bar warning system of FIG. 15 illustrating its assembly, according to one implementation;

FIG. 20 is a rear view of the shaped light bar warning system of FIG. 15;

FIG. 21 is a perspective view of an outer lens that may be disposed over the shaped light bar warning system of FIG. 15, according to one implementation;

FIG. 22 is a perspective view of a frame coupling member according to an alternative implementation;

FIG. 23 is a side view of the frame coupling member shown in FIG. 22;

FIG. 24 is a side view of the outer lens and light guide having a light altering film disposed there between according to one implementation;

FIG. 25 is a side view of a portion of the light guide according to one implementation;

FIG. 26A is a perspective view of an inner surface of an outer cap according to one implementation;

FIG. 26B is a perspective view of an outer surface of the outer cap shown in FIG. 26A; and

FIG. 27 is a perspective view of a tray according to another implementation.

DETAILED DESCRIPTION

Certain exemplary implementations of the invention will now be described with reference to the drawings. In general, such implementations relate to a steering apparatus for a vehicle. FIG. 1 is a partial plan view of an exemplary steering apparatus 100 having a steering grip 102. The steering grip 102 can be configured for gripping to facilitate control of the vehicle. For example, the steering grip 102 may be mounted on a fixed component (not shown) such that it is rotationally movable about a steering axis. An exemplary fixed component can include, for example, a steering column, which receives a steering spindle that extends along the steering axis and serves to transmit the rotational movement of the steering grip 102 to the wheels of the motor vehicle. Rotational movement of the steering grip 102 may be transmitted to the wheels by mechanical and/or electrical means. In an exemplary implementation, the steering grip 102 can include a single continuous grip portion or any number of unique grip sections. For example, the steering grip 102 can include an annular ring shape with an outer contour that is essentially circular in shape. In an alternate implementation, the steering grip 102 can define any suitable shape including, for example, circular, elliptical, square, rectangular, or any other regular or irregular shape.

In an exemplary implementation, the steering apparatus 100 also includes a light element 104 for providing indication and/or warning light signals to the driver of the vehicle. The light element 104 can include, for example, a liquid crystal display (LCD), thin-film-transistor display, active-matrix display, a segmented display (e.g., improved black nematic (IBN), super twisted nematic (STN), etc.), a light-emitting diode (LED), laser, halogen, fluorescent, an infra-red (IR) LED illuminator, organic light emitting diode (OLED) display, or any other suitable light emitting element. In an alternate implementation, the light element can include a light pipe (not shown) having a start and end LEDs located at opposite ends of a (solid or hollow) molded plastic rod. The steering apparatus 100 can also include a reflective material or surface for recycling light emitted from the light element 104 and can be used to direct light to the driver. In an exemplary implementation, when the light element 104 comprises an IR LED illuminator, illumination of the IR LED may also provide a desirable heat effect to the steering grip 102 and may direct heat towards the driver's hands. For example, a steering grip 102 may include a heat element, usually a heater mesh, used to provide a heat effect on the steering grip 102. The heat mesh may be wrapped around the steering grip 102 and/or incorporated into the grip cover material. In an example steering apparatus 100, the heat mesh does not cover over the portion of the steering grip 102 including the light element 104 thereby resulting in a gap in the heat effect. IR LEDs may be used as the light element 104 to provide the heat effect in the area of the light element 104, thereby providing a full heat effect at the surface of the steering grip 102. In another example steering apparatus 100, the heat mesh covers, partially or entirely, the portion of the steering grip 102 including the light element 104, thereby reducing and/or eliminating any gap in the heat effect.

In an exemplary implementation, the light element 104 can display a single color or multiple colors. For example, the exemplary LED can include a single color LED, a bi-color LED, and a tri-color LED. The steering apparatus 100 can include a single light element 104 or any number of light elements 104. Moreover, different types of light elements 104 may be implemented on the same steering apparatus 100. For example, a steering grip 102 may include both standard LEDs and IR LEDs. The light element 104 can be located at any portion of the steering grip 102. For example, as illustrated in FIG. 1, the light element 104 can be located on an interior edge of the steering grip 102. In an alternate implementation, not shown, the light element 104 can be located on an exterior edge of the steering grip 102. In an alternate implementation (not shown), the light element 104 can be located on a front or back face of the steering grip 102. The light element 104 can be provided in a direction defined by the perimeter/diameter of the steering grip 102. For example, as illustrated in FIG. 1, the light element 104 can extend along the direction of the upper half of the steering grip 102 on the inner diameter of the steering grip 102. The light element can define any suitable shape including, for example, circular, elliptical, square, rectangular, or any other regular or irregular shape. For example, as illustrated in FIG. 1, the exemplary light element 104 is provided with an elongated shape having curvilinear sides. In an alternate implementation provided in FIG. 2, the light element 104 can include a vertical element 106 extending in a radial direction of the steering grip 102.

FIG. 3A provides a schematic side cross-section view of an exemplary steering grip 102. As illustrated in FIG. 3A, the exemplary steering grip 102 includes a light element 104 positioned on the inner diameter of the steering grip 102. In particular, FIG. 3A illustrates that the body of the steering grip 102 and the light element 104 can be sized and configured such that the body of the steering grip 102 shields the light element from ambient light 108. For example, as provided in FIGS. 3B and 3C, the light element 104 is shielded from ambient light 108 directed at the upper portion/top side of the steering grip 102. Because the light element 104 is shielded from ambient light 108, a lower intensity light signal may be used. In an exemplary implementation, a daylight warning intensity of the light element 104 may be about 150 to about 800 nit. In a particular implementation, the daylight intensity of the light element 104 may be about 150 to about 500 nit. In another implementation, the daylight intensity of the light element 104 may be about 150 to about 250 nit. In another example, the daylight intensity of the light element 104 may be at least about 250 nit. In another example, the daylight intensity of the light element 104 may be at least about 150 nit. In a further exemplary implementation, because there is less ambient light at nighttime and because the light element 104 is shielding from the existing ambient light 108, the nighttime warning intensity of the light element 104 may be at least about 5 to about 50 nit. In another example, the nighttime warning intensity of the light element 104 may be at least about 5 to about 25 nit. In another example, the nighttime warning intensity of the light element 104 may be at least about 5 to about 15 nit. In another example, the nighttime warning intensity of the light element 104 may be at least about 5 to about 10 nit. In another example, the nighttime warning intensity of the light element 104 may be at least about 5 nit.

In an exemplary implementation, a lens 110 is configured to cover the light element 104. The lens 110 may be sized and shaped to correspond to the size and shape of the light element 104. As illustrated in FIG. 4, the outer surface of the lens 110 may be adjacent to the exterior surface of the steering grip 102. For example, the lens 110 may provide a surface that is congruent with the exterior surface of the steering grip 102. In an alternate implementation (not shown), the lens 110 may provide an outer surface that has a different general shape than the profile defined by the steering grip 102. The outer lens 110 may comprise a fully or partially transparent, translucent, or opaque body. The outer lens 110 can be constructed from a hard or soft material. The outer lens 110 can include a surface feature or texture to provide a grip or “feel” to the driver. The outer lens 110 can be constructed from a single layer of material or multiple layers of material. The outer lens 110 may filter, direct, or otherwise modify the properties of the light signals emitted from the light element 104. In an exemplary implementation, the lens 110 is configured to shield the light element 104 from ambient light.

As illustrated in FIG. 4, the steering grip 102 also includes a frame 112 providing the support structure for the steering grip 102, a carrier 114 mounted to the frame 112 and configured to engage a PCB 116 and/or control circuitry for supporting and controlling operation of the light element 104. The carrier 114 may be sized and shaped to facilitate attachment to various frame 112, PCB 116, and outer lens 110 structures. The carrier 114 can be mounted to the frame 112 using screws, hooks, clips, or any other form of mechanical fastener known in the art. An exemplary carrier 114 may be joined with the frame 112 using a thermally conductive “gap pad” or other thermally conductive adhesive. The frame 112 may also define the support structure for central hub and spokes of the steering grip 103. In an alternate implementation (not shown), the carrier 114 is not required and the PCB 116 and/or control circuitry is coupled to the frame 112 of the steering grip 102. As illustrated in FIG. 4, an exemplary steering grip 102 includes a covering 118 configured to cover the exterior of the steering grip 102 body and provide a surface for the driver to handle during operation of the vehicle. In an exemplary implementation, the covering 118 may also, partially or fully, cover the lens 110 without severely impacting light transmission to the driver. It is contemplated, that, when covering the lens 110, the covering 118 conceals the lens 110 and light element 104 when not illuminated. Exemplary covering 118 materials include, for example, leather, cloth, polyurethane foam, and various other synthetic materials.

In an exemplary implementation, to reduce energy consumption and heat generation, the light emitted from the light element 104 is filtered and guided to maximize the light signal directed through the outer lens 110. In an exemplary implementation, light emitted from the light element 104 is recycled using a solid acrylic lens 128. The lens 128 may be trapezoidal in shape such that light is reflected in the desired direction (i.e., at the driver). In an exemplary implementation, reflective surfaces of the carrier 114 are painted white to ensure that light is reflected in the desired direction and not refracted internal to the system. Fillers and fibers can be added to the outer lens 110 and/or the lens 128 to direct light toward the driver and to increase the brightness of the light output by the outer lens 110. In a further implementation, brightness enhancing films 120 can be used to direct light to the driver. The exemplary brightness enhancing films 120 may be used individually or multiple films may be stacked together. As illustrated in FIG. 5B, multiple brightness enhancing films 120 may be stacked adjacent to the lens 128. In a further implementation, diffusing films 122 and/or textured lens surfaces may be used where high light intensity is not needed. As illustrated in FIG. 5B, diffusing films may be located adjacent to the brightness enhancing films 120. In an alternate implementation, a diffusing film 122 may be located adjacent to the LED 116. Light passes through the diffusing films 122 and into the brightness enhancing films 120. Another diffusing film 122 may be located adjacent to the brightness enhancing films 120 and the lens 110. By securing a tight coupling between the light element 104 to the outer lens 110, the brightness of the output light is increased. Any order or combination of brightness enhancing films 120, diffusing films 122, and lenses 118/110 are contemplated. In an exemplary implementation, the brightness enhancing films 120 and diffusing films 122 may be stacked and oriented in such a way that the ambient light entering the lens 110 cannot pass through the lens 110. Blocking the ambient light allows the lens 110 to have a higher transmission rate while preventing internal components of the light assembly and steering grip 102 from being seen by the driver on from the outside.

The light element 104 can be associated with circuitry for controlling operation of the light signal provided by the light element 104. In an exemplary implementation, the light element 104 may be wired directly to control circuitry of the steering apparatus 100. For example, the light element 104 may include a T-type LED that can be wired through an inline resistor to a steering apparatus 100 power source. In an alternate implementation, the light element 104 can be associated with a PCB (not shown) or processor mounted to or associated with the electronic control unit of the vehicle. The PCB/processor can be configured to provide operation instructions from the vehicle to the light element 104. In a further implementation, the light element 104 may be associated with a PCB 116 configured to provide operation instructions to the light element 104. For example, as illustrated in FIG. 4, the light element 104 can by physically mounted to the surface of the PCB 116. The PCB 116 can include, for example, rigid, semi-rigid, and flexible-type PCBs 116. An example PCB 116 can include a flex circuit wherein the LEDs 116 are mounted to backing material that acts as a heat sink. The backing material can include, for example, an aluminum flex backing. Other types and combinations of PCBs are contemplates.

In an exemplary implementation, the PCB 116 can be mounted to the steering grip 102. For example, as illustrated in FIG. 4, the PCB 116 and/or control circuitry is mounted to the frame 112 of the steering grip 102 via carrier 114. In an alternate implementation (not shown), the PCB 116 and/control circuitry is mounted directly to the frame 112 of the steering grip 102. The board material of an exemplary PCB 116 may be constructed of FR-4 (G-10) glass reinforced epoxy laminate. Because FR-4 has a poor thermal conductivity (approximately 0.003 W/cm·C°), and because the frame 112 may be constructed of materials having high thermal conductivity including, for example, magnesium alloy (diecast) (1.575 W/cm·C°), aluminum alloy (diecast) (2.165 W/cm·C°), and steel (low carbon) (0.669 W/cm·C°), it is desirable to thermally couple the PCB 116 to the frame 112 in order to dissipate heat way from the light elements 104. In an exemplary implementation, the PCB 116 can be thermally coupled to a heat exchange component associated with the steering grip 102. The heat exchange component can be configured to transfer heat from the PCB 116 to the steering grip 102. The heat exchange component may comprise, for example, a thermally conductive resin, an epoxy, a polymer, a silicone, an adhesive, a thermal pad, and/or a metal. In an exemplary implementation, the steering grip 102 may be coupled to the central hub and spokes such that heat from the light element 104 can be transferred from the steering grip 102 to the spokes and central hub of the steering grip 102.

In a high intensity environment (e.g., 5 nit or greater), in order to ensure driver comfort in handling the steering grip 102 and to prolong life of the light element 104 (in hours of illumination), the exemplary heat exchange component must dissipate heat from the light elements 104 at a rate sufficient to ensure that the surface temperature of the steering grip 102 does not exceed, approximately, 45° C. In an alternate implementation where only low intensity light elements 104 are used, the steering apparatus 100 may not include a heat exchange component. For example, in a system where the light element 104 generate a light at an intensity up to only 5 nit, the heat output by the light elements 104 will be not necessitate the use of a heat exchange component for dissipating heat from the light source 104.

In an exemplary implementation, the steering apparatus 100 can include a single PCB 116 or multiple PCBs 116 located along the steering grip 102. For example, as illustrated in FIG. 6A, the steering grip 102 may include a single PCB 116 spanning the entire perimeter of the steering grip 102 thereby providing a 360° illumination system. In an alternate implementation illustrated in FIG. 6B, the steering grip 102 may include a single PCB 116 along the upper half of the perimeter defined by the steering grip 102. In a further implementations illustrated in FIGS. 6C-D, the steering grip 102 may include multiple PCBs 116. Because the steering apparatus 100, and in particular, the steering grip 102, is constructed to withstand substantial loading in the event of a crash, a steering grip 102 including multiple PCBs can provide for less likelihood that a PCB 116 will break upon impact and/or airbag deployment. Moreover, by locating multiple PCBs 116 along the diameter of the steering grip 102, and in particular along the upper half of the steering grip rim 102, helps to reduce the probability that a PCB 116 will break under a load at the 12 o'clock position on the rim of the steering wheel grip 102. As illustrated in FIG. 6C, the steering grip 102 may include multiple PCBs 116, including, for example, PCB 116A may be located on a right portion of the steering grip 102 diameter and PCB 116B may be located on a left portion of the steering grip diameter. In another implementation illustrated in FIG. 6D, the steering grip 102 may include three PCBs 116. PCB 116A may be located on a right portion of the steering grip 102, PCB 116B on a left portion of the steering grip, and PCB 116C on a top center portion of the steering grip 102, between PCBs 116A and 116B. In a further implementation, not shown, the steering grip 102 may include a PCB 116 located on a lower portion of the steering grip 102. Any number of locations and quantities of PCB 116 are considered within the disclosed implementation.

In an exemplary implementation, the PCB 116 includes a single zone or multiple zones for directing operation of the light element 104. For example, in an exemplary implementation, the PCB 116 may include one zone for controlling operation of the light element 104. The PCB 116 may control the light element 104 based on instructions 295 provided to the corresponding zone of the PCB 116. The light element 104 may include a single light source, such as one LED, or it may include multiple light sources, i.e., multiple LEDs. In an exemplary implementation, the PCB 116 can provide separate instructions to each of the individual LEDs within the same zone.

In an alternate implementation, the PCB 116 can include multiple zones, for example, two or more zones, each associated with a different light element 104 or group of light elements 104. Each zone can be configured to provide separate operating instructions to their respective light elements 104. In an exemplary implementation, the LEDs may be arranged into groups and each group of LEDs assigned a zone on the PCB 116. For example, the PCB 116 may include 36 LED-style light elements 104. The exemplary PCB 116 may be divided into four zones, each zone associated with 9 LEDs. The PCB 116 can control operation of the LEDs in each of the four zones separately based on the instructions provided by the respective zones.

In an alternate implementation, the PCB 116 can include a number of zones corresponding to the number of light elements 104 present on the PCB 116, where each zone provides operation instructions to its corresponding light individual element 104. For example, an exemplary PCB 116 may include 36 LED-style light elements 104 and 36 zones corresponding to each of the 36 LEDs. The PCB can individually control operation of each of the 36 LEDs based on instructions provided to each of the corresponding 36 zones.

In an exemplary implementation, the steering apparatus 100 may include a processor connected in communication with the PCB 116. The processor may be configured to direct operation of the light element 104. The processor can be associated with the steering apparatus 100. In an exemplary implementation, the processor may be located on or proximate the PCB 116 of the steering grip 102. In an alternative implementation, the processor may be located on or otherwise associated with the electronic control unit of the vehicle. In a further implementation, the processor may be located on or otherwise associated with an other vehicle system. Where the processor is associated with a system other than the steering apparatus 100 and/or the steering grip 102, communication lines (i.e., data and/or power wires) may be provided from the alternate system to the light element 104. For example, the light element 104 and/or the PCB 116 may be connected to the vehicle's electronic control unit (ECU) by a wire run from the ECU unit to the light element 104/PCB 116. In a further example, particular zones on the PCB 116 may communicate with a processor associated with a system other than the steering apparatus 100 and/or the steering grip 102, and communication lines (i.e., data and/or power wires) may be provided from the alternate system to the zoned PCB 116.

In an exemplary implementation, the light element 104, PCB 116, and the processor are connected in communication with the vehicle by two wires where the first wire may provide a power source to the light element 104, PCB 116, and the processor and the second wire provides a data connection between the steering apparatus 100 and the vehicle. In a further example, the light element 104, PCB 116, and the processor may be connected in communication with the vehicle by two wires, one including multiple communication lines and the second wire including power source. For example, where the PCB 116 includes 6 zones, the first wire may include 6 communication lines for directing the operation of the corresponding zones, and the second wire may be a power source for providing power to the PCB 116. The light element 104, PCB 116, and the processor may, alternatively, be in communication with the vehicle at only a power source.

In an exemplary implementation, the processor may be configured to receive information from the vehicle. Information received from the vehicle may include, for example, GPS (global positioning system) information, navigation information, foreign object proximity information, vehicle performance information, general warning information, course information, positioning information available from on-board sensor, such as cameras, radar, LIDAR (light detection and ranging) systems, vehicle communication system information, and any other information relevant to the operation of the vehicle, the status of the user, and/or the functioning of the steering apparatus 100.

Navigation information may include, for example, a preparation for course change (e.g., lane recommendation in anticipation of pending course change), a navigation course change (e.g., instructions for following determined route and/or notification that the determined route has been recalculated), and a distance to course change (e.g., distance to turn). Foreign object proximity information may include, for example, the distance and direction to an identified foreign object, the size of a foreign object, and the relative speed and direction of the foreign object. Vehicle performance information may include, for example, on/off operation of the vehicle, battery life/status, fuel level, fuel efficiency, engine RPM, vehicle oversteer, vehicle understeer, turbocharger/supercharger boost pressure, an electrical vehicle (eV) status, stop and go vehicle mode, steering grip 102 straight-ahead position, vehicle lateral acceleration, autonomous vehicle driving state information, and adaptive cruise control state information. General vehicle warning information may include, for example, occupant restraint information, airbag status information, door or window open/ajar, low tire pressure, vehicle entertainment and communication system status (e.g., incoming call, Bluetooth activated, audio volume, etc.). Course information may include, for example, a measure of a course remaining (e.g., a racing lap time countdown as a binary clock, lap segments, time segments, etc.) and a measure of the course remaining/completed (e.g., quantity of racing laps).

Operation of the light element 104 may be directed in response to information received from the steering apparatus 100 and/or information received from the vehicle. The light element 104 may be used to provide information and warning signals to the driver of the vehicle. In a further implementation, the light element 104 may be used to provide an aesthetically pleasing/decorative effect. For example, the light element 104 may be used at vehicle start up to provide a decorative effect in addition to providing an indication to the driver of the vehicle's operation status.

Directing illumination of the light element 104 may include, for example, the on/off state of the light element 104, intensity, design/pattern, on/off illumination cycle, color, or any other feature of the light element that can be controlled or otherwise manipulated. In an exemplary implementation, the on/off status of the light element 104 can be controlled. For example, in an implementation including multiple light elements 104, the quantity of light elements 104 illuminated at a given time can be used to indicate the magnitude and/or scale of the warning or event, the greater the number illuminated the greater the threat and/or importance of the warning/event. Similar to quantity, the intensity of the light elements 104 can be used to indicate the magnitude and/or scale of the warning or event, the greater the light intensity the greater the threat and/or importance of the warning/event. The on/off illumination cycle or frequency of illumination of the light element 104 can also be controlled to create a flashing or strobe-like effect. For example, a high frequency on/off illumination cycle may be used to indicate an important and/or time sensitive event to the driver such as an impact or collision warning. In a further example, when the light element 104 comprises an IR illuminator, a strobed/flashing light signal may be used to illuminate the driver's eyes for use in camera-based driver monitoring systems. The operation of the exemplary IR illuminator-type light element 104 may be timed in communication with a camera, or other sensing device, and a processor to capture an image of the driver's eyes. Moreover, the use of IR LEDs can be used to mitigate light reflection when the driver is wearing eye glasses.

The selection of a light element 104 for illumination at a certain position can also be used to indicate the relative position of the warning or event. For example, if an impact or collision warning is anticipated at the front driver's side section of the car, the light element 104 at a corresponding position on the steering grip 102 (i.e., upper left quadrant) may be illuminated. Similarly, the on/off illumination cycle may be used to create a motion effect. The perceived direction of the light pattern can be used to indicate the relative direction of warning. For example, an on/off illumination pattern starting from the center of the steering grip 102 and progressing toward the left side of the grip 102 may create an illuminated wave-like effect toward the left that can be used to indicate a warning/event associated with the left side of the vehicle or an indication to the driver of a pending course change in a navigational setting.

In an exemplary steering apparatus 100, a pattern of illumination of the light element 104 can also be controlled. For example, in an implementation including multiple light elements 104, the light elements 104 may be sized and located such that a shape or pattern may be created by illuminating particular light elements 104. In an exemplary implementation, the color of the light element 104 can also be controlled. The color of the light element may be used to indicate the severity or a threat level associated with a particular event. For example, colors such as red, yellow, and green can be used to indicate the escalating severity/threat associated with a particular event, red indicating severe, yellow a moderately severe/warning, and green little or no threat. For example, if the vehicle senses an impact or collision warning or if the vehicle is traveling faster than allowable speed limit, the color of the light elements 104 may progress from green to yellow to red as the severity of the warning/event escalates. In an alternate implementation, controlling the color of the light element 104 may be used to indicate a vehicle status or provide general driver indications. For example, colors such as blue or white may be used to indicate general vehicle status and driver indication.

The following illumination combinations are provided as exemplary and should not be considered limiting on the disclosed invention. Additional and alternative light element 104 locations and configurations are contemplated. Various combinations of light element 104 operation may be utilized to indicate the relative position and/or threat levels associated with a particular warning/event, as well as provide general status information to the driver.

In an exemplary implementation, operation of the light element 104 may be directed in response to information received from the vehicle and/or information received from the steering apparatus 100. Information received from the vehicle can include, for example, GPS information, on-board sensor information, camera information, communication system information, and lane position information. The operation of the light element 104 may be directed to provide the driver with a lane departure warning. An exemplary lane departure warning indication wherein the light position indicates the direction of the threat event is illustrated in FIG. 7. When the vehicle is in a straight ahead orientation, the illuminated light element 104 may be centered on the steering grip 102 (Position 1). In response to the received information, as the vehicle moves to the left side of the lane of travel, the light elements 104 on the left side of the steering grip 102 are illuminated (Position 2). As the vehicle moves progressively further toward the left side of the lane of travel, light elements 104 further along the left side of the steering grip 102 are illuminated (Position 3 and Position 4). Alternatively, as the vehicle moves to the right side of the lane of travel, the light elements 104 on right side of the steering grip are illuminated (Position 2). As the vehicle moves progressively further toward the right side of the lane of travel, the light elements 104 further along the right side of the steering grip are illuminated (Position 3 and Position 4). In an exemplary implementation, the time to lane cross may be used to determine the threat level associated with the vehicles direction of travel.

As outlined above, both the quantity and position of lights may be used to indicate the relative position and/or threat level associated with the warning/event. An exemplary lane departure warning indication wherein the quantity and position of illuminated light elements 104 are used to indicate the relative position and/or threat level of the warning or event is provided in FIG. 8. When the vehicle is in a straight ahead orientation, the illuminated light element 104 may be centered on the steering grip 102 (Position 1). In response to information received from the vehicle (e.g., GPS information, on-board sensor information, camera information, communication system information, and lane position information), as the vehicle moves to the left side of the lane of travel, additional light elements 104 on the left side of the steering grip 102 are illuminated (Position 2). As the vehicle moves progressively further toward the left side of the lane of travel, additional light elements 104 further along the left side of the steering grip 102 are illuminated (Position 3 and Position 4). Alternatively, as the vehicle moves to the right side of the lane of travel, additional light elements 104 on right side of the steering grip are illuminated (Position 2). As the vehicle moves progressively further toward the right side of the lane of travel, additional light elements 104 further along the right side of the steering grip are illuminated (Position 3 and Position 4). In an exemplary implementation, the time to lane cross may be used to determine the threat level associated with the vehicles direction of travel and the rate and quantity of the illumination of the additional light elements 104 are illuminated.

As outlined above, the color of the illuminated light elements may be used to indicate the relative position and threat level associated with the warning/event. An exemplary lane departure warning indication wherein the color and position of the illuminated light elements 104 are used to indicate the relative position and/or threat level of the warning or event is provided in FIG. 9. When the vehicle is in a straight ahead orientation, the illuminated light element 104 may be centered on the steering grip 102. The illuminated light element may be provided in a color that indicates no threat/warning associated with the given lane position. As illustrated in FIG. 9, the illuminated light element may be green when the steering grip 102 is a centered/straight ahead position (Position 1). In response to information received from the vehicle (e.g., GPS information, on-board sensor information, camera information, communication system information, and lane position information), as the vehicle moves to the left or right side of the lane of travel, the light elements 104 on the left side of the steering grip 102 or the light elements 104 on the right side of the steering grip 102 are illuminated. An initial indication of lane departure may be provided by green illuminated light elements 104 (Position 2). As the vehicle moves progressively further toward the left or right side of the lane of travel, light elements 104 further along the left/right side of the steering grip 102 are illuminated. These light elements may indicate a moderate threat/warning and may be provided, for example, by yellow illuminated light elements 104 (Position 3). As the vehicle moves progressively further toward the left or right side of the lane of travel, the light elements 104 further along the left/right side of the steering grip 102 are illuminated. These light elements may indicate a severe and/or immediate threat and may be provided, for example, by red illuminated light elements 104 (Position 4). In an exemplary implementation, the time to lane cross may be used to determine the threat level associated with the vehicles direction of travel.

In a further implementation, the vertical element 106 can include be used to indicate the relative position and threat level associated with a particular warning/event. As illustrated in FIG. 10, the vertical element 106 may include a plurality of light elements 104. When the vehicle is in a straight ahead orientation, the light elements 104 centered in the vertical element 106 may be illuminated (Position 1). Because the relative threat/warning level in the straight ahead position is minimal, the illuminated light element 104 in Position 1 may be green. In response to information received from the vehicle (e.g., GPS information, on-board sensor information, camera information, communication system information, and lane position information), as the vehicle moves to the left or right side of the lane of travel, the light elements 104 on the left or right side, respectively, of the vertical element 106 are illuminated. For example, an initial indication that the vehicle is tending toward the left side of the lane of travel may be provided by illumination of the light elements 104 on the left side of the vertical element (Position 2). These light elements 104 may indicate a moderate threat/warning and may be provided, for example, by yellow illuminated light elements 104. As the vehicle moves progressively further toward the left or right side of the lane of travel, the light elements 104 may change colors from yellow to red, indicating that the threat level associated with the lane departure has escalated from moderate to severe and/or immediate.

In an exemplary implementation, the vertical element 106 can be used to indicate the relative position and/or threat level associated an impact/collision warning. As illustrated in FIG. 11, the vertical element 106 may include a plurality of light elements 104. The operation of the light elements 104 may be directed in response to foreign object proximity information received from the vehicle. Illumination of the light elements 104 may indicate the presence of a foreign object within a predetermined distance of the vehicle and/or a distance to the foreign object. In response to the object data, the light elements 104 located on the steering grip 102 illuminate. For example, as the object is approaching the light elements 104 may illuminate in a wave pattern suggesting the direction of the object and/or the proximity of the object to the vehicle. As a further example, the light elements 104 may illuminate in an illumination pattern, at a greater on/off frequency, at a particular quantity of light elements 104, with greater intensity, and/or varying colors as the direction and/or the proximity of the object to the vehicle change.

In an exemplary implementation, the vertical light element 106 can be used in conjunction with the light elements 104 position on the side of the steering grip 102. For example, as illustrated in FIG. 12, the light elements 104 can be used to guide the driver in operation of the vehicle. An exemplary steering apparatus 100 can be used guide a driver into a parking space. In the exemplary implementation, the light elements 104 can be used to direct the driver to aim the vehicle in a particular manner. Operation of the light elements 104 can include, for example, on/off illumination, illumination pattern, on/off cycling, intensity, and color. It is contemplated that operation of the light elements 104 of the vertical element 106 may be independent from the operation of the light elements 104 included along the diameter of the steering grip 102. For example, the light elements 104 of the vertical element 106 may be used to indicate proximity to a foreign object (e.g., parked car) while the light elements 104 included along the diameter of the steering grip 102 as used to provide directional and navigation information to the user. As illustrated in FIG. 12, the light elements 104 included along the diameter of the steering grip 102 can illuminate at a location and frequency to suggest the direction of travel of the vehicle. In an alternate implementation, the operation of the light elements 104 of the vertical element 106 may be in cooperation with the light elements 104 included along the diameter of the steering grip 102. For example, both the vertical and radial light elements 104 may be used to provide navigation information to suggest the direction of travel of the vehicle.

In a further implementation, the vertical and/or radial light elements 104 may be used to indicate a difference between the posted speed limit and the actual speed of the vehicle. For example, the steering apparatus 100 may receive information including GPS information and vehicle performance information. The GPS information may include information associated with a posted speed limit at the vehicle's current location. The vehicle performance information may include information associated with the actual speed of the vehicle. The vehicle and/or the steering apparatus 100 can determine that the vehicle is exceeding the posted speed limit and the operation of the light elements 104 may be directed to indicate a threat/warning associated with speed of the vehicle.

In an exemplary implementation, the steering apparatus may include a sensor (not shown) located on the steering grip 102. The sensor may detect the driver input and/or touch on the steering grip. Exemplary sensors include, for example, capacitive sensors, pressure sensors, and conductivity/resistivity sensors. The sensor may be in communication with the PCB 116 and/or the processor. In an further implementation, the driver's input may be transmitted to the electronic control unit of the vehicle. In an exemplary implementation, the steering apparatus 100 may be configured to receive autonomous driving state information and/or adaptive cruise control information from the vehicle. The autonomous driving state information may indicate that the vehicle is operating autonomously and not under human control. The adaptive cruise control information may include whether the adaptive cruise control feature is engaged. Adaptive cruise control maintains a set distance between the car immediately in front of the driver's vehicle and/or stops the vehicle completely when an emergency situation is identified. In some autonomous driving state and the adaptive cruise control settings, some vehicles direct acceleration/braking of the vehicle in addition to controlling steering (e.g., to keep the vehicle within the lane when braking). For the lane keeping feature of the adaptive cruise control it is essential that the driver be holding the steering grip 103 or the braking feature will not engage. Similarly, in some situations the autonomous driving state of the vehicle may disengage (e.g., stop and go traffic), in these situations it is also essential that the driver holding the steering grip 103. Therefore, using on the received information about the state of the vehicle and/or sensor information confirming the driver's input/contact with the steering apparatus 100, operation of the light element 104 may be directed to indicate that the vehicle is not operating under human control or that human operation of the vehicle is necessary and the driver is required to engage the steering grip 102.

In an alternative implementation (not shown), the steering apparatus 100 also includes an acoustic display and/or a haptic display devices that work exclusively from or in conjunction with the light element 104. The haptic displays can include, for example, vibrators arranged on the steering grip 102/steering apparatus 100 such that vibration of the steering grip 102 is felt by the driver in every grip position. The steering apparatus 100 may be configured to direct operation of the vibrator in response to information received from the vehicle, information received from the steering grip 102, and/or input information received from the driver at the steering grip 102. Operation of the vibrator can include, for example manipulating the frequency and intensity the produced vibration.

It should be appreciated that the logical operations described herein with respect to the various figures may be implemented (1) as a sequence of computer implemented acts or program modules (i.e., software) running on a computing device, (2) as interconnected machine logic circuits or circuit modules (i.e., hardware) within the computing device and/or (3) a combination of software and hardware of the computing device. Thus, the logical operations discussed herein are not limited to any specific combination of hardware and software. The implementation is a matter of choice dependent on the performance and other requirements of the computing device. Accordingly, the logical operations described herein are referred to variously as operations, structural devices, acts, or modules. These operations, structural devices, acts and modules may be implemented in software, in firmware, in special purpose digital logic, and any combination thereof. It should also be appreciated that more or fewer operations may be performed than shown in the figures and described herein. These operations may also be performed in a different order than those described herein.

When the logical operations described herein are implemented in software, the process may execute on any type of computing architecture or platform. For example, the functions of the PCB, processor, control circuitry, and vehicle electronics control unit, as described above, may be implemented on any type of computing architecture or platform. An exemplary implementation illustrated in FIG. 13 provides an example computing device upon which embodiments of the invention may be implemented. The computing device 1300 may include a bus or other communication mechanism for communicating information among various components of the computing device 1300. In its most basic configuration, computing device 1300 typically includes at least one processing unit 1306 and system memory 1304. Depending on the exact configuration and type of computing device, system memory 1304 may be volatile (such as random access memory (RAM)), non-volatile (such as read-only memory (ROM), flash memory, etc.), or some combination of the two. This most basic configuration is illustrated in FIG. 13 by dashed line 1302. The processing unit 1306 may be a standard programmable processor that performs arithmetic and logic operations necessary for operation of the computing device 1300.

Computing device 1300 may have additional features/functionality. For example, computing device 1300 may include additional storage such as removable storage 1308 and non-removable storage 1310 including, but not limited to, magnetic or optical disks or tapes. Computing device 1300 may also contain network connection(s) 1316 that allow the device to communicate with other devices. Computing device 1300 may also have input device(s) 1314 such as a keyboard, mouse, touch screen, etc. Output device(s) 1312 such as a display, speakers, printer, etc. may also be included. The additional devices may be connected to the bus in order to facilitate communication of data among the components of the computing device 1300. All these devices are well known in the art and need not be discussed at length here.

The processing unit 1306 may be configured to execute program code encoded in tangible, computer-readable media. Computer-readable media refers to any media that is capable of providing data that causes the computing device 1300 (i.e., a machine) to operate in a particular fashion. Various computer-readable media may be utilized to provide instructions to the processing unit 1306 for execution. Common forms of computer-readable media include, for example, magnetic media, optical media, physical media, memory chips or cartridges, a carrier wave, or any other medium from which a computer can read. Example computer-readable media may include, but is not limited to, volatile media, non-volatile media and transmission media. Volatile and non-volatile media may be implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data and common forms are discussed in detail below. Transmission media may include coaxial cables, copper wires and/or fiber optic cables, as well as acoustic or light waves, such as those generated during radio-wave and infra-red data communication. Example tangible, computer-readable recording media include, but are not limited to, an integrated circuit (e.g., field-programmable gate array or application-specific IC), a hard disk, an optical disk, a magneto-optical disk, a floppy disk, a magnetic tape, a holographic storage medium, a solid-state device, RAM, ROM, electrically erasable program read-only memory (EEPROM), flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices.

In an example implementation, the processing unit 1306 may execute program code stored in the system memory 1304. For example, the bus may carry data to the system memory 1304, from which the processing unit 1306 receives and executes instructions. The data received by the system memory 1304 may optionally be stored on the removable storage 1308 or the non-removable storage 1310 before or after execution by the processing unit 1306.

Computing device 1300 typically includes a variety of computer-readable media. Computer-readable media can be any available media that can be accessed by device 1300 and includes both volatile and non-volatile media, removable and non-removable media. Computer storage media include volatile and non-volatile, and removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. System memory 1304, removable storage 1308, and non-removable storage 510 are all examples of computer storage media. Computer storage media include, but are not limited to, RAM, ROM, electrically erasable program read-only memory (EEPROM), flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by computing device 1300. Any such computer storage media may be part of computing device 1300.

It should be understood that the various techniques described herein may be implemented in connection with hardware or software or, where appropriate, with a combination thereof. Thus, the methods and apparatuses of the presently disclosed subject matter, or certain aspects or portions thereof, may take the form of program code (i.e., instructions) embodied in tangible media, such as floppy diskettes, CD-ROMs, hard drives, or any other machine-readable storage medium wherein, when the program code is loaded into and executed by a machine, such as a computing device, the machine becomes an apparatus for practicing the presently disclosed subject matter. In the case of program code execution on programmable computers, the computing device generally includes a processor, a storage medium readable by the processor (including volatile and non-volatile memory and/or storage elements), at least one input device, and at least one output device. One or more programs may implement or utilize the processes described in connection with the presently disclosed subject matter, e.g., through the use of an application programming interface (API), reusable controls, or the like. Such programs may be implemented in a high level procedural or object-oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language and it may be combined with hardware implementations.

FIG. 14 provides schematic illustration of an exemplary computer architecture upon which the invention may be implemented. The computing device 1400 may include a processing unit 1406 and a memory 1404. The memory 1404 may include various registers. Exemplary registers may include an LED enable register, an LED location register, and LED color register, and an LED intensity register. The computing device 1400 may include a light element driver for providing illumination instructions to the light element 104.

The computing device 1400 may include a bus 1402 or other communication mechanism for communicating information among various components of the computing device 1400. In an exemplary implementation, the bus 1402 may provide a communication link between the computing device 1400 and the vehicle. In an alternate implementation, the bus 1402 may provide a communication link between the computing device 1400 and various vehicle components. Information transmitted by the bus 1402 may include, for example, lane departure warning signal information, GPS signal information, general warning signal information, and vehicle performance indication signal information.

An exemplary implementation may include a clock spring 1408 associated with the processing unit 1406 and the communication bus 1402. The clock spring 1408 may provide an electrical connection/communication link between the processing unit 1406 and other vehicular systems via the bus 1402 when the processing unit 1406 is disposed on the rotatable portion of the steering grip 102/steering apparatus 100. An exemplary clock spring 1408 includes a rotary-type electrical connection that permits rotation of the steering grip 102 while maintaining an electrical connection with the bus 1402. For example, the clock spring 1408 may include a static element, generally mounted to the steering column, and a rotating element, generally mounted to the steering grip 102.

The implementations shown in FIGS. 15-27 include a shaped light bar warning system 204 as the light element. The shaped light bar warning system 204 is disposed on the arcuate shaped rim portion of a steering grip 102 of steering apparatus 100 in a vehicle. For example, FIG. 15 illustrates the shaped light bar warning system 204 disposed in the upper, central portion of a steering wheel 102 of the vehicle. The warning system 204 is configured to communicate to the operator of the vehicle one or more of the following conditions: whether there is an object in a blind spot area adjacent the vehicle, whether the vehicle is approaching an object in front of the vehicle too quickly, whether the operator should turn the vehicle toward the right or left, and/or whether the vehicle is drifting outside of its lane. In other implementations, the warning system 204 may be configured for communicating other information to the vehicle operator, such as is described above in relation to FIGS. 1 through 14.

FIG. 16 illustrates a perspective view of the shaped light bar warning system 204 according to one implementation. The warning system 204 includes a liquid crystal display (LCD) 206, a light guide 208, and at least one light emitting diodes (LED) 210. The LCD 206 includes an outer surface 212, an inner surface 214, a first end 216, and a second end 218. The outer surface 212 and inner surface 214 extend between the ends 216, 218, are arcuate-shaped, and are spaced apart from and opposite each other relative to a plane that extends through the ends 216, 218 and is parallel to the outer 214 and inner surfaces 216.

In one implementation, the LCD 206 is an improved black nematic (IBN) display that includes a plurality of electrical traces that define the portions of the display that may be selectively illuminated to communicate to the vehicle operator. For the IBN display shown in FIG. 16, the glass is normally black, but when the traces are turned on (receive a current), the portion of the glass adjacent the traces becomes transparent allowing light to pass through the portion and out of the outer surface 214. In other implementations (not shown), the LCD 206 can be any type of LCD suitable for communicating to the operator.

In addition, the MN display 206 shown in FIG. 16 includes a chip-on-glass configuration, wherein an LCD driver that provides current to the traces is disposed on the LCD glass. Processor 1406 communicates to the LCD driver is disposed adjacent the LCD glass and is in electrical communication with the LCD driver via a flexible, wire tape 209 that is coupled between the LCD driver and the processor, such as processor 1406 described above in relation to FIGS. 13 and 14. In other implementations, the processor may be a separate processor from processor 1406. In addition, the processor may be disposed on the warning system 204, such as shown in FIG. 20 and described below, or on another part of the rotatable portion of the steering wheel 102. The processor that controls the LCD driver may also control operation of the LEDs 210, or a separate processor may be provided to control the LCD driver and the LEDs 210, according to various implementations. In addition, in some implementations, the LEDs 210 are turned off when the LCD 206 is turned off.

The LCD 206 shown in FIGS. 15-20 includes three warning areas. The three warning areas include blind spot warning areas 219 a, 219 b adjacent each end 216, 218 of the LCD 206, a lane departure warning area 221 adjacent a central portion of the LCD 206, and forward collision/proximity warning areas 223 a, 223 b between the lane departure warning area 221 and the blind spot warning areas 219 a, 219 b. However, in alternative implementations, the LCD may be configured to provide other types of warnings to the vehicle operator or other passengers in the vehicle.

Each blind spot warning area 219 a, 219 b includes a vertically oriented bar adjacent each end 216, 218 and an arrow inward of the vertically oriented bar that points toward the bar. The blind spot warning area 219 a is illuminated in response to receiving information that there are one or more objects within a certain distance range on the left side of the vehicle, and the blind spot warning area 219 b is illuminated in response to receiving information that there are one or more objects within a certain distance range on the right side of the vehicle. The warning areas 219 a, 219 b may be illuminated anytime there is an object within the distance range on the respective side of the vehicle, or only when the vehicle is moving toward the objects without the respective blinker on, according to certain implementations. Furthermore, the blind spot warning areas 219 a, 219 b may be illuminated in one or more colors, such as white, green, yellow, and/or red. And, in certain implementations, the blind spot warning areas 219 a, 219 b may appear to flash on and off to further attract the operator's attention.

The lane departure warning area 221 includes two trapezoidal shaped areas that narrow in width toward a top of the area 221. Two arrows are disposed on either side of the trapezoidal shaped areas and point inwardly toward the trapezoidal shaped areas and each other. In response to receiving information that the vehicle is drifting out of its lane toward the left, the trapezoidal shaped areas and the left arrow are illuminated. Similarly, in response to receiving information that the vehicle is drifting out of its lane toward the right, the trapezoidal shaped areas and the right arrow are illuminated. The processor controlling the illumination may illuminate the lane departure warning area 221 when the vehicle is drifting out of its lane but the blinker is not on, according to one implementation.

The forward collision warning/proximity warning areas 223 a, 223 b each include a set of three, arcuate shaped bars that are vertically arranged relative to each other. The lengths of the bars are staggered such that the bar closest to the hub of the steering wheel 102 is shortest, and the length of the bar furthest from the hub is longest. As the vehicle approaches an object in front of the vehicle, for example, both sets of bars begin to illuminate in order from the shortest bar to the longest bar. As another example, the processor controlling the illumination of the bars may illuminate one of the sets of bars as the vehicle approaches a turn that corresponds to the side of the set of bars, illuminating the bars in order from the shortest to the longest as the vehicle gets closer to the turn. For example, the right set of bars may be illuminated as the vehicle approaches a right turn. As another example, the bars may flash when the vehicle gets within a certain distance of a turn or an object in front of the vehicle that poses a collision risk. Furthermore, the bars may be illuminated in one or more colors to communicate with the operator. For example, the bars may be illuminated white or green to communicate an upcoming turn. Alternatively, the lowest bars may be illuminated yellow when a forward collision risk is initially detected, and the uppermost bars may be illuminated red when the forward collision risk is within a certain distance range of the vehicle.

In other implementations (not shown), the warning areas described above may be displayed on another type of arcuate shaped display, such as an arcuate shaped OLED display.

The light guide 208, which is shown more clearly in FIG. 19, includes an outer surface 220, an inner surface 222, a first end 224, and a second end 226. The outer surface 220 and inner surface 222 extend between the ends 224, 226, are arcuate-shaped, and are spaced apart from and opposite each other relative to a plane that extends through the ends 224, 226 and is parallel to the outer 220 and inner surfaces 222. The outer surface 220 of the light guide 208 is disposed adjacent the inner surface 214 of the LCD 206, as shown in FIGS. 17 and 18. The light guide 208 is configured for transmitting light through at least a portion of its outer surface 220 toward the inner surface 214 of the LCD 206 to illuminate the selected portions of the LCD 206. In the implementation shown in FIGS. 16-20, the light guide 208 is configured for transmitting light through the entire outer surface 220 of the light guide 208. Exemplary materials that may be used for the light guide 208 include polycarbonate, polycarbonate blends, acrylic, nylon, or other suitable materials.

The outer surface 220 of the light guide 208 may define a plurality of micro-lenses configured for guiding light exiting the outer surface 220 of the light guide 208 to exit at an angle of about 90° from the outer surface 220. For example, the micro-lenses may include a plurality of V-shaped notches defined in the outer surface 220, a plurality of embossed or debossed radial notches defined in the outer surface 220, or a combination thereof. An exemplary portion of the outer surface 220 of light guide 208 with V-shaped notches 232 defined thereon is shown in FIG. 25. In other implementations (not shown), the inner surface of the light guide 208 may define the micro-lenses. These micro-lenses may be in addition to or as an alternative to the micro-lenses on the outer surface 220. In addition, in some implementations, a light diffusing film may be disposed on the outer surface 220 of the light guide 208 to prevent the micro-lenses from being visible to a vehicle operator.

The LEDs 210 are disposed adjacent the first end 224 of the light guide 208 and emit light into the first end 224 of the light guide 208. For example, the LEDs 210 may be top-firing LEDs that are disposed on a surface 230 of PCB 228, such as is shown in FIG. 19. The surface 230 of the PCB 228 on which the LEDs 210 are disposed is arranged at an angle of about 90° to the inner 222 and outer surfaces 220 of the light guide 208. However in other implementations, the LEDs may be side firing and may be arranged at an alternative, suitable angle relative to the inner 222 and outer surfaces 220 of the light guide 208.

The PCB 228 shown in FIG. 19 defines a recessed portion 233. The recessed portion 233 may be configured to fit adjacent the frame 112 of the steering wheel 102. For example, as shown in FIG. 19, the recessed portion 233 is arcuate shaped to fit around a portion of the frame 112. In other implementations (not shown), the recessed portion 233 may be configured to follow the profile of the frame 112. In other implementations (not shown), the PCB 228 may be configured to couple to the frame 112 or an intermediate structure using other suitable fastening mechanisms.

The warning system 204 may also include a tray 234 that defines a channel. At least a portion of the channel may have a reflective surface. In particular, the channel defined by the tray 234 may include a floor 238 and side walls 240 a, 240 b. The floor 238 is arcuate shaped, and the side walls 240 a, 240 b extend perpendicularly from each arcuate shaped side of the floor 238. The inner surface 222 of the light guide 208 is disposed on the floor 238 between the side walls 240 a, 240 b, and the inner surface 214 of the LCD 206 is disposed on the outer surface 220 of the light guide 208 between the side walls 240 a, 240 b. The reflective surface is configured for reflecting light into the light guide 208. For example, the reflective surface may reflect light that has escaped the light guide 208 back into the light guide 208. The reflective surface can be a film, coating, paint, or other suitable material applied to the channel of the tray 234, or the reflective surface may be integrally formed with the tray 234. In addition, the reflective surface may have a metallic color, a glossy finish, a textured finish, or some other suitable color or finish that is cosmetically appealing when the light source is turned off. In some implementations, the tray 234 may also include a third side wall at a distal end 240 c of the tray 234 that extends from the floor 238 at an angle of about 90°, such as is shown in FIG. 19. Exemplary materials that may be used for the tray 234 include polycarbonate-acrylonitrile butadiene styrene (PC-ABS), nylon, polycarbonate, acrylic-styrene-acrylonitrile-polycarbonate (ASA-PC), polypropylene (PP), or other suitable materials.

The warning system 204 may also include a frame coupling member 242 that is configured for coupling the tray 234 to the frame 112 of the steering wheel 102. The frame coupling member 242 includes inner 246 and outer surface 248 that extend between a first end 250 and a second end 252 of the frame coupling member 242. The inner 246 and outer surfaces 248 are arcuate shaped and are opposite and spaced apart from each other relative to a plane that extends between the first 250 and second ends 252 and is parallel to the inner 246 and outer surfaces 248. The tray 234 is disposed on the outer surface 248 of the frame coupling member 242 such that the channel faces away from the frame 112 of the steering wheel 102, and the inner surface 246 of the frame coupling member 242 is disposed adjacent and facing the frame 112. The first end 250 includes an attachment leg 254 that extends from the inner surface 246 at an angle of about 90°. The attachment leg 254 defines a recessed portion 256 that is configured to receive at least a portion of frame 112. For example, the recessed portion 256 may be arcuate shaped, such as is shown in FIG. 19, or the recessed portion 256 may trace the profile of the frame 112. In addition, the attachment leg 254 may define one or more bosses 258 that are configured for receiving fasteners for joining the attachment leg 254 of the tray 242 to the PCB 228. Furthermore, the inner surface 246 of the frame coupling member 242 may include fastening mechanisms for securing the frame coupling member 242 to the frame 112. Fastening mechanisms may include, but are not limited to, one or more clips, one or more bosses for receiving fasteners such as screws, bolts, or ties, for example, or grooves/extended portions for engaging a mating portion on the steering wheel frame 112. Other methods of fastening the frame coupling member 242 to the frame 112 may include adhesives, welding, or other suitable fastening methods.

The frame coupling member 242 may include a thermally conductive material such that the frame coupling member 242 can transfer heat from the PCB 228 and/or other components of the system 204 to the frame 112.

In other implementations (not shown), the system 204 may not include the frame coupling member 242, and the tray 234 and/or light guide 208 may be coupled to the frame 112 directly or indirectly via another structure.

FIG. 27 illustrates another implementation of the tray 234′. In this implementation, tray 234′ is directly coupled to the frame 112, without the need for separate frame coupling member as described above. The second end 252′ of the tray 234′ includes an attachment leg 254′. In addition, the first end 250′ of the tray 234′ and the second end 252′ each define an opening 292 a, 292 b, respectively. A fastening mechanism, such as those described above, may be engaged through each of the openings 292 a, 292 b to couple the tray 234′ to the steering wheel frame 112. In addition, in the implementation shown in FIG. 27, the tray 234′ defines a slot 294 through which the PCB, such as PCB 228 shown in FIG. 19, may be inserted.

The warning system 204 may also include an outer lens that is coupled adjacent the outer surface 212 of the LCD 206 to improve the robustness of the LCD 206. FIG. 21 illustrates one implementation of outer lens 260. The outer lens 260 defines a channel having a ceiling 262 and at least two walls 264 a, 264 b that extend away from the ceiling 262 adjacent each side of the ceiling 262. The ceiling 262 includes an inner surface 266 and an outer surface 268 that are arcuate shaped and are opposite and spaced apart from each other relative a plane that extends through each end of the outer lens 260. The side walls 264 a, 264 b extend from the inner surface 266 along each arcuate shaped side of the inner surface 266 at an angle of about 90°. The side walls 264 a, 264 b are disposed adjacent the tray side walls 240 a, 240 b, and the inner surface 266 is disposed adjacent the outer surface 212 of the LCD 206. The outer lens 260 is transparent such that light from the LCD 206 may pass through it and be visible to the vehicle operator. Exemplary materials that may be used for the outer lens 260 include polycarbonate, polycarbonate blends, acrylic, nylon, or other suitable materials.

Furthermore, various fastening mechanisms may be used to secure the outer lens 260 relative to the light guide 208, including a friction fit, one or more clips, snaps, clamps, screws, or bolts, welding, heat staking, or a combination thereof

FIG. 24 shows an alternative implementation of the warning system 204 that includes one or more light altering films 280, such as films 120, 122 described above, disposed between the outer lens 260 and the light guide 208. The light altering films 280 may be configured for diffusing, focusing, blocking, partially blocking, enhancing, or redirecting light passing between the outer surface 220 of the light guide 208 and the inner surface 266 of the outer lens 260. The films 280 may be applied to the inner surface 266 of the outer lens 260, the outer surface 264 of the outer lens 260, the outer surface 220 of the light guide 208, or a combination thereof, for example.

For example, in one alternative implementation, the warning system 204 may be configured to not include the LCD 206. In such an implementation, the warning system 204 communicates with the vehicle operator via the light emitted from the light guide 208. This implementation provides a simple, low cost method of communicating with the operator.

In one such implementation, an outer cap 295, such as is shown in FIGS. 26A and 26B, is disposed over the tray 234 and the light guide 208 and is coupled to the tray 234 and/or frame 112. FIG. 26A illustrates an inner surface 302 of the outer cap 295. As shown, the outer cap 295 has an upper edge 296 and a lower edge 297 that are arcuate shaped between a first end 298 of the cap 295 and a second end 299 of the cap 295 to follow the curvature of the steering wheel. The outer cap 295 defines an arcuate shaped opening 290 in a central portion of the cap 295. Outer lens 260′ is disposed adjacent the opening 290. The lens 260′ may be coupled to the inner surface 302 of the cap 295 via an adhesive 301 or other suitable fastening mechanism. As shown in FIG. 26B, when the cap 295 is disposed over the tray 234 and light guide 208 and its outer surface 303 is facing the cabin of the vehicle, light from the light guide 208 is emitted through the lens 260′, creating a narrow, arcuate shaped light bar. In implementations in which the cap 295 is opaque, light is only emitted from the lens 260′. However, in other implementations, at least a portion of the cap 295 may be translucent.

The cap 295 may have a curved or partially curved inner surface 302 and outer surface 303 to correspond with an annular shaped surface of some steering wheels. In addition, the outer surface 303 of the cap 295 may be colored or covered with a material to match or correspond with the skin of the steering wheel.

When the LEDs are not on, ambient light may enter the lens 260′ and illuminate the reflective surface of the tray 234. To avoid this creating a distraction or being aesthetically unpleasing, the tray 234 may be coated with a material, such a darker reflective material (e.g., metallic colored), or subjected to a surface treatment, such as to provide a glossy or textured finish. Alternatively or in addition, the outer lens 260′ may be tinted to reduce the transmissivity of the lens 260, which can reduce the amount of ambient light that enters the lens 260′ and light guide 208. In addition, in some implementations, the outer lens 260′ and the cap 295 are integrally formed, and areas having different transmissivity may be formed using one or more light altering films disposed on the cap 295 (e.g., using in mold decoration (IMD) labeling or other suitable process). FIGS. 22 and 23 show an alternative implementation of the warning system 204 that includes a first set of LEDs 110 adjacent the first end 224 of the light guide 208 and a second set of LEDs 111 adjacent the second end 226 of the light guide 208. The LEDs 110, 111 emit light into respective ends 224, 226 of the light guide 208.

In the implementations described above with respect to FIGS. 15 through 25, the outer surfaces of various components of the light bar warning system 204 are arcuate-shaped such that the radius of curvature of these components is similar to the radius of curvature of the portion of the steering wheel 102 on which the warning system 204 is disposed and the arcuate shaped portions follow the arcuate shaped portion of the steering wheel frame 112. This may provide a more aesthetic appearance to the vehicle operator. In addition, by including the warning system 204 adjacent an upper central portion of the steering wheel 102, the warning system 204 is within the field of view of the vehicle operator while the vehicle operator is looking towards the front of the vehicle, thus providing a more effective and less disruptive method of communicating to the vehicle operator.

While the foregoing description and drawings represent the preferred implementation of the present invention, it will be understood that various additions, modifications, combinations and/or substitutions may be made therein without departing from the spirit and scope of the present invention as defined in the accompanying claims. In particular, it will be clear to those skilled in the art that the present invention may be embodied in other specific forms, structures, arrangements, proportions, and with other elements, materials, and components, without departing from the spirit or essential characteristics thereof. One skilled in the art will appreciate that the invention may be used with many modifications of structure, arrangement, proportions, materials, and components and otherwise, used in the practice of the invention, which are particularly adapted to specific environments and operative requirements without departing from the principles of the present invention. In addition, features described herein may be used singularly or in combination with other features. The presently disclosed implementations are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims and not limited to the foregoing description.

It will be appreciated by those skilled in the art that changes could be made to the implementations described above without departing from the broad inventive concept thereof. It is understood, therefore, that this invention is not limited to the particular implementations disclosed, but it is intended to cover modifications within the spirit and scope of the present invention, as defined by the following claims. 

What is claimed is:
 1. A light bar system for a steering wheel of a vehicle, the display system comprising: a light guide having an outer surface and an inner surface that extend between a first end and a second end of the light guide, the outer and inner surfaces of the light guide being arcuate-shaped between the ends of the light guide and spaced apart and opposite each other relative to a plane that extends through the first and second ends of the light guide and is parallel to the outer and inner surfaces of the light guide; at least one light source disposed adjacent the first end of the light guide, the light source configured for emitting light into the first end of the light guide, wherein the light guide is configured for transmitting light from the light source through at least a portion of the outer surface of the light guide an outer lens having an outer surface and an inner surface that extend between a first end and a second end of the outer lens, the outer and inner surfaces of the outer lens being arcuate-shaped between the ends of the outer lens and spaced apart and opposite each other relative to a plane that extends through the first and second ends of the outer lens and is parallel to the outer and inner surfaces of the outer lens, wherein the inner surface of the outer lens is disposed adjacent the outer surface of the light guide; and a liquid crystal display (LCD) having an outer surface and an inner surface that extend between a first end and a second end of the LCD, the outer and inner surfaces of the LCD being arcuate-shaped between the ends of the LCD and spaced apart and opposite each other relative to a plane that extends through the first and second ends of the LCD and is parallel to the outer and inner surfaces of the LCD, wherein the LCD is disposed between the outer surface of the light guide and the inner surface of the outer lens.
 2. The light bar system of claim 1, wherein the LCD is an improved black nematic (IBN) display.
 3. The light bar system of claim 1, wherein the light source is a light emitting diode (LED).
 4. The light bar system of claim 3, wherein the LED is a top-firing LED.
 5. The light bar system of claim 4, further comprising a printed circuit board (PCB), the PCB having a surface on which the LED is disposed, and the surface being arranged at an angle of about 90° to the outer and inner surfaces of the light guide.
 6. The light bar system of claim 5, further comprising a computer processor configured for electrically communicating with a driver of the LCD, the computer processor being disposed on a rotatable portion of the steering wheel.
 7. The light bar system of claim 6, wherein the computer processor is disposed adjacent the LCD.
 8. The light bar system of claim 5, wherein the PCB is directly coupled to a frame of the steering wheel.
 9. The light bar system of claim 5, further comprising a frame coupling member, the frame coupling member being directly coupled to the PCB and the frame, wherein at least a portion of the heat generated by the PCB is transferred through the frame coupling member to the frame.
 10. The light bar system of claim 1, further comprising a computer processor configured for electrically communicating with a driver of the LCD, the computer processor being disposed on a rotatable portion of the steering wheel.
 11. The light bar system of claim 10, wherein the computer processor is disposed adjacent the LCD.
 12. The light bar system of claim 1, wherein the light source is a first light source, and further comprising a second light source disposed adjacent the second end of the light guide, the second light source configured for emitting light into the second end of the light guide.
 13. The light bar system of claim 1, further comprising a tray disposed adjacent the inner surface of the light guide, the tray comprising a reflective surface that is configured for reflecting light into the light guide.
 14. The light bar system of claim 13, wherein the tray comprises an arcuate-shaped floor and two side surfaces that extend orthogonally away from the floor of the tray, the floor of the tray being disposed adjacent the inner surface of the light guide.
 15. The light bar system of claim 14, wherein the LCD is disposed between the two side surfaces of the tray.
 16. The light bar system of claim 1, wherein the outer surface of the light guide comprises a plurality of micro-lenses configured for guiding light exiting the outer surface of the light guide to exit at an angle of about 90° from the outer surface.
 17. The light bar system of claim 1, wherein the outer lens.
 18. The light bar system of claim 1, wherein: the inner and outer surfaces of the LCD and light guide have a radius of curvature that corresponds to a radius of curvature of an arcuate shaped portion of a frame of the steering wheel, and the LCD and light guide are configured for being coupled to the arcuate shaped portion of the frame such that the inner and outer surfaces of the LCD and light guide follow the arcuate-shaped portion of the frame.
 19. The light bar system of claim 18, wherein the LCD and light guide are disposed within an arcuate shaped tray, and the arcuate shaped tray is coupled to the arcuate shaped portion of the frame.
 20. The light bar system of claim 19, further comprising a frame coupling member, wherein the tray is coupled directly to the frame coupling member, and the frame coupling member is coupled directly to the arcuate shaped portion of the frame.
 21. A light bar system for a steering wheel of a vehicle, the display system comprising: a light guide having an outer surface and an inner surface that extend between a first end and a second end of the light guide, the outer and inner surfaces of the light guide being arcuate-shaped between the ends and spaced apart and opposite each other relative to a plane that extends through the first and second ends of the light guide and is parallel to the outer and inner surfaces of the light guide; at least one light source disposed adjacent the first end of the light guide, the light source configured for emitting light into the first end of the light guide, wherein the light guide is configured for transmitting light from the light source through at least a portion of the outer surface of the light guide; an outer lens having an outer surface and an inner surface that extend between a first end and a second end of the outer lens, the outer and inner surfaces of the outer lens being arcuate-shaped between the ends of the outer lens and spaced apart and opposite each other relative to a plane that extends through the first and second ends of the outer lens and is parallel to the outer and inner surfaces of the outer lens, wherein the inner surface of the outer lens is disposed adjacent the outer surface of the light guide; and an outer cap having an outer surface and an inner surface that extend between a first end and a second end of the outer cap, the outer and inner surfaces of the outer cap being arcuate-shaped between the ends of the outer cap and spaced apart and opposite each other, wherein the inner surface of the outer cap is disposed adjacent the outer surface of the light guide, and wherein the outer cap defines an arcuate shaped opening, and the outer lens is coupled to the outer cap adjacent the opening.
 22. The light bar system of claim 21, further comprising one or more light directing films disposed between the outer surface of the light guide and the inner surface of the outer lens.
 23. The light bar system of claim 21, wherein: the inner and outer surfaces of the lens and the light guide have a radius of curvature that corresponds to the radius of curvature of an arcuate shaped portion of a frame of the steering wheel, and the lens and light guide are configured for being coupled to the arcuate shaped portion of the frame such that the inner and outer surfaces of the lens and light guide follow the arcuate-shaped portion of the frame.
 24. The light bar system of claim 23, wherein the light guide is configured for transmitting light through the entire outer surface of the light guide.
 25. The light bar system of claim 21, wherein the light source is a first light emitting diode, and the system further comprises a second light emitting diode adjacent the second end of the light guide, the second light emitting diode configured for emitting light into the second end of the light guide.
 26. The light bar system of claim 21, wherein the light source is a light emitting diode (LED).
 27. The light bar system of claim 26, wherein the LED is a top-firing LED.
 28. The light bar system of claim 27, further comprising a printed circuit board (PCB), the PCB having a surface on which the LED is disposed, and the surface being arranged at an angle of about 90° to the outer and inner surfaces of the light guide.
 29. The light bar system of claim 28, wherein the PCB is directly coupled to the frame of the steering wheel.
 30. The light bar system of claim 28, further comprising a frame coupling member, the frame coupling member being directly coupled to the PCB and the frame, wherein at least a portion of the heat generated by the PCB is transferred through the frame coupling member to the frame.
 31. The light bar system of claim 21, further comprising a tray disposed adjacent the inner surface of the light guide, the tray comprising a reflective surface that is configured for reflecting light into the light guide.
 32. The light bar system of claim 31, wherein the tray comprises an arcuate-shaped floor and two side surfaces that extend orthogonally away from the floor of the tray, the floor of the tray being disposed adjacent the inner surface of the light guide. 